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/*========================================================================

//

//      sys/select.h

//

//      POSIX definitions for select()

//

//========================================================================

// ####ECOSGPLCOPYRIGHTBEGIN####

// -------------------------------------------

// This file is part of eCos, the Embedded Configurable Operating System.

// Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.

//

// eCos is free software; you can redistribute it and/or modify it under

// the terms of the GNU General Public License as published by the Free

// Software Foundation; either version 2 or (at your option) any later

// version.

//

// eCos is distributed in the hope that it will be useful, but WITHOUT

// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

// for more details.

//

// You should have received a copy of the GNU General Public License

// along with eCos; if not, write to the Free Software Foundation, Inc.,

// 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

//

// As a special exception, if other files instantiate templates or use

// macros or inline functions from this file, or you compile this file

// and link it with other works to produce a work based on this file,

// this file does not by itself cause the resulting work to be covered by

// the GNU General Public License. However the source code for this file

// must still be made available in accordance with section (3) of the GNU

// General Public License v2.

//

// This exception does not invalidate any other reasons why a work based

// on this file might be covered by the GNU General Public License.

// -------------------------------------------

// ####ECOSGPLCOPYRIGHTEND####

//========================================================================

//#####DESCRIPTIONBEGIN####

//

// Author(s):     jlarmour

// Contributors:

// Date:          2001-07-26

// Purpose:       This file provides the macros, types and functions

//                required by POSIX 1003.1.

// Description:   Much of the real contents of this file get set from the

//                configuration (set by the implementation)

// Usage:         #include <sys/select.h>

//

//####DESCRIPTIONEND####

//

//======================================================================

*/

/* CONFIGURATION */

#include <pkgconf/system.h>          

#include <pkgconf/isoinfra.h>          /* Configuration header */

#ifdef CYGPKG_IO_FILEIO

    #include <pkgconf/io_fileio.h>          

    #define     FD_SETSIZE CYGNUM_FILEIO_NFD    

#endif

/* ------------------------------------------------------------------- */

#if !defined(_POSIX_SOURCE)

#ifdef CYGINT_ISO_SELECT

# ifdef CYGBLD_ISO_SELECT_HEADER

#  include CYGBLD_ISO_SELECT_HEADER

# else

#   ifndef CYGONCE_ISO_SYS_SELECT_FD_SETS

#   define CYGONCE_ISO_SYS_SELECT_FD_SETS

#define NBBY    8               /* number of bits in a byte */

/*

 * Select uses bit masks of file descriptors in longs.  These macros

 * manipulate such bit fields (the filesystem macros use chars).

 * FD_SETSIZE may be defined by the user, but the default here should

 * be enough for most uses.

 */

#ifndef FD_SETSIZE

#define FD_SETSIZE      256

#endif

typedef unsigned int    fd_mask;

#define __NFDBITS       (sizeof(fd_mask) * NBBY)        /* bits per mask */

#ifndef __howmany

#define __howmany(__x, __y)     (((__x) + ((__y) - 1)) / (__y))

#endif

typedef struct fd_set {

        fd_mask fds_bits[__howmany(FD_SETSIZE, __NFDBITS)];

} fd_set;

#define FD_SET(__n, __p)   ((__p)->fds_bits[(__n)/__NFDBITS] |= (1 << ((__n) % __NFDBITS)))

#define FD_CLR(__n, __p)   ((__p)->fds_bits[(__n)/__NFDBITS] &= ~(1 << ((__n) % __NFDBITS)))

#define FD_ISSET(__n, __p) ((__p)->fds_bits[(__n)/__NFDBITS] & (1 << ((__n) % __NFDBITS)))

#define FD_COPY(__f, __t)                                       \

{                                                               \

    unsigned int _i;                                            \

    for( _i = 0; _i < __howmany(FD_SETSIZE, __NFDBITS) ; _i++ ) \

        (__t)->fds_bits[_i] = (__f)->fds_bits[_i];              \

}

#define FD_ZERO(__p)                                            \

{                                                               \

    unsigned int _i;                                            \

    for( _i = 0; _i < __howmany(FD_SETSIZE, __NFDBITS) ; _i++ ) \

        (__p)->fds_bits[_i] = 0;                                \

}

#   endif /* CYGONCE_ISO_SYS_SELECT_FD_SETS */

#  ifndef __NEED_FD_SETS_ONLY

#   ifndef CYGONCE_ISO_SYS_SELECT_H

#   define CYGONCE_ISO_SYS_SELECT_H

#   ifdef __cplusplus

extern "C" {

#   endif

struct timeval;

extern int

select( int /* nfd */, fd_set * /* in */, fd_set * /* out */,

        fd_set * /* ex */, struct timeval * /* tv */ );

#ifdef CYGPKG_POSIX

# include <pkgconf/posix.h>

# ifdef CYGPKG_POSIX_SIGNALS

#  include <signal.h>

struct timespec;

extern int

pselect( int /* nfd */, fd_set * /* in */, fd_set * /* out */,

        fd_set * /* ex */, const struct timespec * /* ts */,

        const sigset_t * /* mask */);

# endif

#endif

#   ifdef __cplusplus

}   /* extern "C" */

#   endif

#   endif /* CYGONCE_ISO_SYS_SELECT_H multiple inclusion protection */

#  endif /* __NEED_FD_SETS_ONLY */

# endif

#endif

#endif /* if !defined(_POSIX_SOURCE) */

/* ------------------------------------------------------------------- */

/* EOF sys/select.h */